Headphone



FIG. 1 is a perspective view of a headphone showing the new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a side elevational view of one side thereof;

FIG. 5 is a side elevational view of the opposite side thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is another perspective view thereof; and,

FIG. 9 is another perspective view thereof, in a folded configuration.

The broken lines and unshaded areas form no part of the claimed design. 

CLAIM The ornamental design for a headphone, as shown and described. 